Water-cooled portable electric welding machine



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M v vf vMmiL-"Q'rfx TER -cooLEn PORTABLE 'ELECTRIC-WELDING MACHINE FiiedMarch 2l; '1924. z sheets-sheet 1 ffl,

Aug. il9 1925.v

M. w.r MoEsTA V"WATER CQOLED PORTABLE ELECTRICWELDING'MACHINE 2Shams-Sheet 2 Filed March 24, 1924 il @EW/m l- @Irren/neg Patented Aug.1925i.

y' MARviN w. ivroEsTA, or DETROIT, Mio'HIeAN" l, j

,WATER-COOLE'DTOBTABLE ELECTRIC WELDING'MAGEINE.- f'

To all whom it 'litanyn conce/m:

Be it known that I, MARVIN W. Moiis'rzi, a citizen of the United States,residing at Detroit, in the county ofWayne and State of l\'iichigan,have invented certain new and useful Improvements in Water-CooledPortable Electric Welding Machines, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to a water-cooled portable electric weldingmachine and my invention aims to provide a machine wherein bothelectrodes are movable, such being in contradistinction to machineshaving one or more stationary electrodes which prevent the machine frombeing carried to a piece of work and used for welding purposes.`Ordinarily the work is carried to a machine,

but in many industries, particularly that of v automobile manufacture,there are many places requiring welding that cannot be convenientlydone,"without disassemblingl part-s oi' the automobile and carrying suchparts to an ordinary welding machine. It is in this connection, that myportable welding machine can be used in many places not accessible to anordinary welding machine.

My invention further aims to provide a welding machine that is watercooled throughout, particularly in connection with the conductor. of themovable electrode. Electric 4welding machines require a high amperage,for instance fifteenthousand on a low voltage ranged from three to six.Or-

dinarily it is necessa to use a heavy copper wire or cable for this4.purpose andsuch a cable cannotlbe conveniently bent, for instancewhenfmanipulating the movable electrode relative to a piece of work.Instead of using a heavy comparatively rigidconduetor, my invention aims-to use a flexible cable, and to carry oit' the heat vgenerated by thecurrent, that passes through the cable, the iriexible cable is encasedin a water jacket l through which water or some other cooling agent iscirculated. Such a" cable'and its flexible water cooling jacket willpermit of a movable electrode being freely manipulated relative'to apiece of work, whether the work be onl abench having a 'stationary Ielectrode or Iwhether the movablelelectrode is used in connectionwith amovable anvil serving as an electrode.,

My invention further aims to control a Application led March 24, 1924.Serial No, 701,328. I

Welding current,` for instance of'ltwo' hlindred and twentyor fourhundred and forty `voltage, by a solenoid switch which-may be operatedby aiseparate current of one hundred and ten volts,for in some instancesthe solenoid switch may be operated off of the Welding current. v i f Myinvention further aims to provide a spot weldingmachine wherein -amovable"- electrode may be manually manipulated like any ordinary handtool, and the construction entering into the machine will`be-.hereinafter specifically kdescribed and then claimed. I i YReference will now be had to the drawings, wherein-e`-` i Figurel isyaside elevation of the welding macliine,'partly broken away and partlyin section; Fig. 2 is an enlarged longitudinalv sectional view of themovable electrode, and l Fig.' 3 is a similar view of vconnections forithemovable electrode. l i In the drawings, the reference numeral 1denotes a bench, vise, or suitable support provided with an electrode 2on which may be placed a piece :off work 3. Supported from the bench 1by a hanger or bracket4- v is a transformer includingv a' secondarywinding 5 anda primary winding 6, said primary winding have a terminalconnection 7 withthe electrode 2 and a terminal connection "8 with 'aAcoupling member 9 mounted on `the bench 1. .v

Suitably connected to the coupling member 9 is a socket member 10 forthe inner end of a cable 11 andthe opposite end of said cable is held bya socket 'member 12 attached to an electrode support vor arm. 13 havinga detachable electro e 14. As point' ed out in the'beginning, the cable11 may be composed of two hundred and twenty,- ve ampere wireshwovenintostrands. and over two hundred strands ma formlthe cable-'so that it"will have a hig amperage carrying capacity `on a .10W volta e ran efrom'three to six; `On account oit is cab e beinglmade ofifiney wiresit.y is iexible, thus permitting the"electrode arm 13 being freelymanipulated, over'thepiece ofwork.y 3for manipulated in most anyposition withinthe length yofthe cable. 1 if. Mounted on the socketmembers 10 and l2 are T connections 14 and connecting said T connectionsis a hose or flexible conduit having its ends retained on theconnections 14 by clamps 16 or otherv holding means. The hose 15 is justas exible as the cable 11 and is retained in spaced relation to thecable 11 by the T connections 14, which are also spaced relative to saidcable by the socket members 10. Y

`.duced end 23 of the bore 21 so as to communicate with a coupling pipe24, 4.carried bythe arm 13;

Clamped or otherwise mounted on the cou.4 pling pipe 24'is another smallhose or conduit 25 having its opposite end clamped on a coupling pipe26V mounted'in the coupling Vmember 9 to communicate with a passage 27v'1n said coupling member, and the passage 27 communicates with a waterinlet pipe 28.

Water or any other cooling agent admitted at the pipe 28 passes throughthe passage 27, pipe`26, hose. 25 and .pipe 24, into the reduced end 23of 'the bore 21. The water passes outwardly through the tube 22, backthrough the bore' 21, pipe 20, hose 15, pipe 17, and passage 18 to theoutlet pipe 19. This provides a circulation through the hose 15, aboutthe cable 11 and also through the electrode arm 13. Heat will beabsorbed.

and carriedvofi' by the water and in consequence of this water jacketthe machine is water cooled throughout, without the water jacketinterferingy in the least with the flexible water and current carryingconnection between the arm 13 and the source of supply for the water andelectric current.

To at all times retain the small hose 25 1n proximity to the large hose15, so that a workman may conveniently use the machine, aseries ofstraps or other encircling devices 29 may lbe employed at intervalsthroughout r the length of the hose 15.

The electrode arm 13 is provided with a suitable handle 30 and a plungerswitch 31, said plunger switch having a springv retracted plunger orbutton 32 opera-table at the handle 30. The switch has leading-out wires33 extending through a conduit 34 which may also retained alongside thehose 15 by the straps 29. The conductor 34 extends to a solenoid switch35 supported from the bench 1 in proximity to the transformer and theleadmg-out'wires 33 are in circuit throu h a solenoid 36, with leadinginwires 37 om a suitable source of electrical energy, for instance anordinary lighting circuit of one hundred and ten volts.

The solenoid 36 has its core supporting contact members 38 adapted toengage contact members 39 includedl in the circuit of the secondary coil5 of the transformer, there' being leading-in wires 40 fora weldingcircuit which ma be of two hundred and twenty or four undred and forty'volts.

To place the welding machine in operation it is only necessary to presson the plunger or button 32 and close the primary switch which causesthe solenoid 36 to be energized to close the main operating circuit forthe welding machine. -Any means may be employed 'for maintaining acirculation of water throughout the machine and it is obvious that theelectrode arm 13 can be freely manipulated relative to a piece of workon the bench or relative to any other piece of work where anotherelectrode may be located or an electrical connection established -inorder to complete the circuit for welding purposes.. This means that mymachine is not necessarily limited to use on a bench, for an anvil orother equivalent may be used with the transformer and solenoid switch atsome'remote place. Broadly, my invention involves a flexible water andcurrent carrying connection which will permit of an electrode arm orsupport being freely moved, in contradistinction to an electrode used ina stationary welding machine. I therefore do not care to confine myinvention to such details as pipe connections, hose lsupports or thetransformer4 and switch appurtenances, and such other changes may bemade as are permissible by the appended claims.

What I claim is Y 1. In an electric welding machine, the combination ofelectrodes adapted for a welding circuit, a iexible current carryingconnection for one of said electrodes, and a flexible water jacketaround said connection.

2. An electric welding machine as called for in claim 1, wherein saidconnection is in the form of a flexible cable and said jacket in theform of a flexible hose, around said cable, and another hose cooperatingwith the first mentioned hose in providing art of a circulating watercooling system or the machine.

3. An electric welding machine comprising electrodes adapted for awelding circuit, a bored arm engaging one of said electrodes, a lexibleelectric connection for said arm, and a water jacket for said connectioncommunicating with said' arm.

4. An electric welding machine as called for in claim 3, and a hoseadjacent said connection cooperating with said water jacket inmaintaining al water cooling system for said machine.

5. In an electric welding machine, the

vcombination with a stationary electrode in a welding circuit, of` aflexible cable in the same circuit, an electrode connected to said lwith said hollow arm for circulating a cooling agent through said arm,one of said conduits being flexible and inclosng said cable.

7. In an electric welding machine, the combination of a bench, anelectrode thereon, a welding circuit, a coupling member in said circuit,a cable attached to said coupling member, a hollow electrode supportingarm attached to said cable, and conduits'adapted to circulate waterthrough said hollow arm,

one of said conduits providing a water jacket for said cable.

8. An electric welding machine as called for in claim 7, wherein saidcoupling member has water inlet and outlet connections communicatingwith said conduits.

9. An electric welding machine as called for in claim 7, in combinationwith a switch for said welding circuit and a switch on said armcontrolling the first mentioned -switch.

10. In an electric Welding machine, the combination of a bench, anelectrode thereon, a welding circuit, a solenoid switch in said circuit,a coupling member in said circuit, a cable attached to said couplingvsaid cable, a hose inclosing said cable and communicating vwith saidarm 'and said coupling member, water connections for said couplingmember, a hose outside the first mentioned hose and cooperatingtherewith and with said arm and coupling member in providing a watercirculating system for said cable, and a primary switch on said armcontrolling said solenoid switch 11.*The combination of electrodes, atransformer adapted to supplycurrent to said electrodes, a cableengaging one of said electrodes s o that it may be freely manipulatedrelative to said transformer', and means for cooling said cablethroughout its length. f 12. The combination called for in claim 11,wherein the last mentioned means includes a water carrying hoseinclosing said cable.

13. The combination called for in claim 11, wherein the last mentionedmeans includes conduits adapted to provide for the` circulation of waterwith one of said' conduits inclosing said cable to constantly maintainwater about said cable.

In testimony whereof I aiiix my signature in presence .of two witnesses.

. MARVIN W. MOES'IA.

Witnesses:

ANNA M. Donn, 0. F. BAM-Hm..

